Danfoss FP975 User manual

FP975

7-Day Electronic Programmer

Installation Guide

Danfoss Heating

MAKING MODERN LIVING POSSIBLE

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FP975

For a large print version of these instructions

please call Marketing on 0845 121 7400.

Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other

printed material. All trademarks in this material are property of the respective companies.

Certification Mark

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Danfoss Heating 3

Installation Instructions

FP975

7 Day Electronic Programmer

Index

1.0 Installation Guide .....................................................................................4

2.0 System Overview.......................................................................................4

3.0 Installation ...................................................................................................4

3.1 DIL Switch Settings ...........................................................................4

3.2 New Installations................................................................................5

3.3 Existing Installations.........................................................................8

3.4 Wiring.....................................................................................................9

3.5 230 Vac Fully Pumped System - Zone Valves ...........................9

3.6 230 Vac Controlled Gravity Hot Water..................................... 10

3.7 230 Vac Fully Pumped System - Mid-Position Valves......... 10

3.8 Wiring Conversions ........................................................................ 11

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FP975

Speciﬁcation

Power supply 230 Vac ± 15%, 50/60 Hz

Switching action

2 x SPDT voltage free, Type 1B

Switch rating 10-230 Vac, 3(1)A

Battery back-up 24 hours minimum

Timing Accuracy ±1 min/month

Setting/Running Accuracy ±1 minute

Max. Ambient Temperature 45°C

Dimensions, mm (W, H, D) 148 x 96 x 42

Design standard EN 60730-2-7

Control Pollution Situation Degree 2

Rated Impulse Voltage 2.5kV

Ball Pressure Test 75°C

1.0 Installation Guide

2.0 System Overview

Please Note:

This product should only be installed by a qualiﬁed electrician or

competent heating installer and should be in accordance with the

current edition of the IEEE wiring regulations.

Before mounting the unit, ensure the 4 DIL switches on the rear of

the unit have been moved to the required settings.

RIGHT

LEFT

TOP

MK.9 SET

PUMPED GRAVITY

7 DAY/24 HR 5/2 DAY

24 HR 7 DAY

3.0 Installation

3.1 DIL Switch Settings

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Danfoss Heating 5

MK.9 or SET

The FP975 is supplied ﬁtted with a Danfoss Randall SET wallplate.

However the FP975 will also mount directly onto a Danfoss Randall

MK.9 wallplate without the need for wiring changes. However when

used with existing MK.9 wallplates the left hand switch must be set

in the MK.9 position to re-conﬁgure the time control to match MK.9

wiring connections.

PUMPED or GRAVITY

When this switch is in the PUMPED position the Heating and Water

outputs are UNLINKED. When in the GRAVITY position the Water

output is LINKED to the Heating output so that whenever the

Heating is ON the Water will also be ON regardless of the Water

programme.

Place the switch in the PUMPED position if the system being

controlled is a) fully pumped with a mid-position valve, b) fully

pumped with a two port zone valve in each circuit, c) GRAVITY

Hot Water, PUMPED Heating with a two port zone valve with SPDT

auxiliary switch in the gravity primary circuit (and wired in accordance

with diagrams on pages 9-10).

Place the switch in the GRAVITY position if the system being

controlled is a) fully pumped, but with only a single two port zone

valve in the Heating circuit, b) GRAVITY Hot Water, PUMPED Heating

with no zone valves.

7 Day, 5/2 Day or 24 Hour

When both switches are in the 7 DAY position each day of the

week may be programmed with diﬀerent ON/OFF times. When the

switch is in the 5 DAY/2 DAY position, weekdays (Mon-Fri) can be

programmed with one set of ON/OFF times, and weekends (Sat-Sun)

can be programmed with a diﬀerent set. When both switches are in

the 24 hour position the same set of times will be repeated in every

24 hour period.

3.2 New Installation

1. Fix the wallplate to the wall or plaster box as required.

When ﬁxing the wallplate note that the terminals are at the top,

and the vertical centre line of the unit lies between terminals N

and L.

2. Surface cables can only enter from below the unit. If mounted on

a plaster box, cables can enter from the rear through the aperture

in the wallplate.

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FP975

3. The FP975 oﬀers direct plug-in replacement to the following

models (see below):

Manufacturer Model

Fully Pumped

Systems Pumped/

Gravity Selector

Position

Gravity H.W.

Systems Pumped/

Gravity Selector

Position

Wallplate

Type

Mode Sw

Position

Danfoss Randall

FP975 Pumped Gravity SET SET

922 Unlinked Linked MK.9 MK.9

972 Unlinked Linked MK.9 MK.9

SET 2* Unlinked Linked SET SET

SET 5 Unlinked Linked SET SET

Horstmann

Diadem 425 Pumped Gravity SET SET

Tiara 425 Pumped Gravity SET SET

Tiara 525 Pumped Gravity SET SET

Tiara 527 Pumped Gravity SET SET

Direct Plug-In Upgrade for Existing Programmers

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Danfoss Heating 7

IMPORTANT NOTE

If the timeswitch to be replaced is listed below it may be worth

considering a FP715 Si as an alternative to the FP975. The FP715 Si

oﬀers wallplate compatibility for those models listed below, although

some re-wiring may be required.

If the new unit is replacing an existing time control having an

incompatible wiring conﬁguration, then the wiring conversions

(tables A and B, pages 12-15) will be of assistance.

4. For wiring connections please refer to diagrams on pages 9-10.

Please note, the FP975 does not require an earth connection,

although a terminal is provided for earth continuity purposes.

5. Ensure that the two retaining screws on the top of the timeswitch

are fully unscrewed. Locate the retaining lugs on the bottom

inside surface of the plug-in module under the wallplate base and

hinge the unit upwards until the module is pressed fully against

the top of the wallplate. Tighten the two screws on the top of the

module to secure the module to the wallplate.

6. A small blanking plug is supplied to blank the unused recessed

bottom ﬁxing screw.

7. Before setting the programmes the unit should be RESET by

pressing the recessed button marked R/S. Ensure the mains

power to the control circuit is switched on, and check the circuits

as follows.

8. Use the (Hot Water) SELECT button to get to the ON mode to

switch the hot water output ON. Adjust the cylinder thermostat

and check the service operates correctly. Use the SELECT button

to get to OFF mode and check that the service does not operate.

9. Use the (Heating) SELECT button to get to the ON mode to

switch the heating output ON. Adjust any remote thermostat(s)

and check that the service operates correctly. Use the SELECT

button to get to OFF mode and check that the service does not

operate.

MAKE MODELS

ACL LS2411, LS522, LS722, LP241, LP522, LP722

Drayton Tempus 3, Tempus 4, Tempus 7

Landis & Gyr RWB 2, RWB 2-9, RWB 200, RWB 252, RWB 20, RWB 40

Glowworm Mastermind

Potterton Mini-Minder

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FP975

Ensure that the power to the existing unit is switched oﬀ prior to

removal.

SYSTEMS RE-USING EXISTING WALLPLATE

Use the table on page 6 to conﬁrm wallplate compatibility.

• If the existing wallplate is of the SET pattern, follow instruction

5-9 from the “New Installations” section.

• Should the existing product be a Danfoss Randall MK.9 time

control the instructions below should be followed:

Remove and discard the white test point cover ﬁtted to the top1.

of the MK.9 wallplate.

Slide the small switches on the rear of the module marked MK.9 -2.

SET to the MK.9 position.

Ensure that the two retaining screws on the top of the timeswitch3.

are fully unscrewed. Firmly press the module onto the wallplate

and tighten the two screws on the top of the module. An additional

ﬁxing screw to hold the bottom of the unit onto the wallplate is

packed separately and must be ﬁtted. The screw should be placed

into the recessed hole, beneath the programming ﬂap, adjacent

to the COPY button, screwed through the plastic retaining ring

and securely tightened.

Follow steps 5-9 from the “New Installations”section.4.

SYSTEMS HAVING INCOMPATIBLE BACKPLATES

Follow the“New Installations”instructions paying particular attention

to item 3).

3.3 Existing Installation

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Danfoss Heating 9

3.4 Wiring

Always switch oﬀ mains ﬁrst and never ﬁt programmer to a live

wallplate.

N/O

T2E LINK

ALS 1 & 5

ON A SET

LATE

NL123456

TIMER

OFF

COM

DHW

N/C

COM

HTG

OFF

N/O N/C

3.5 230 Vac Fully Pumped System

2 x 2-port Zone Valves with Aux. Sw. PUMPED switch selection

N L 1 2 3 4 5 6

BOILER PUMP

ATC

DHW

VALVE

HTG

VALVE

RMT

Earths not

shown.

Ensure

continuity

throughout

MAINS

fused 3A

DHW

OFF

DHW

COM

HTG

OFF

HTG

COM

HEAT

PLAN

230

Vac

For 230 Vac systems link L, 2 & 5.

For Wiring Conversion tables see pages 12-15.

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FP975

3.7 230 Vac Fully Pumped System

3-Port Mid-Position Valve PUMPED Switch Selection

N L 1 2 3 4 5 6

BOILER PUMP

ATC

RMT

MAINS

fused 3A

DHW

OFF

DHW

COM

HTG

OFF

HTG

COM

HS3

HEAT

Earths not

shown.

Ensure

continuity

throughout

230

Vac

3.6 230 Vac Controlled Gravity Hot Water

Pumped Heating System PUMPED Switch Selection

N L 1 2 3 4 5 6

BOILER

PUMP

ATC

RMT

MAINS

fused 3A

DHW

OFF

DHW

COM

HTG

OFF

HTG

COM

HP28C Earths not

shown.

Ensure

continuity

throughout

230

Vac

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